In modern South Korea, pop stars and politics don’t often mix. But BTS are addressing controversial topics, which is why tons of fans love them outside of their addictive music.

BTS, who just became the first K-pop act ever to top the Billboard charts, have become a record-setting success story. The seven young men who make up the group have been speaking their minds since their debut, openly discussing LGBTQ rights, mental health and the pressure to succeed, all touchy subjects in South Korea.

We recently saw them on the Billboard Awards stage dominating, and they were amazing. Check out one of the their rehearsals, where they prove that practice makes perfect.